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A preparation process of special activated carbon for formaldehyde absorption

A preparation process and formaldehyde absorption technology, applied in the field of activated carbon, can solve the problems of unsatisfactory formaldehyde absorption capacity and slow adsorption speed, and achieve the effect of large specific surface area and uniform distribution

Active Publication Date: 2021-04-06
徐州国锐环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, in home decoration and tooling, because paints and paints contain a large amount of formaldehyde, activated carbon is used to adsorb formaldehyde, but the current activated carbon has an unsatisfactory absorption capacity for formaldehyde, and the adsorption speed is slow.

Method used

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  • A preparation process of special activated carbon for formaldehyde absorption

Examples

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Comparison scheme
Effect test

Embodiment 1

[0025] A preparation process of special activated carbon for formaldehyde absorption, comprising the following steps:

[0026] (1) Crush the raw materials into 200-500 mesh granules, put the granular raw materials into a pressure tank for pressure treatment, stop pressurization after the pressure reaches 3.4MPa and keep the pressure for 10 minutes, and then release the pressure tank within 1 minute Press to normal pressure; the raw material is fruit shell, sawdust, wood mixture;

[0027] (2) Mix the pressurized raw material with 2% tea polyphenols by raw material quality, and heat the mixed material to 60°C in the gas whose oxygen ratio is 32.8%, and the balance is nitrogen, argon, and neon. Stir the mixture continuously in the middle, and end it after heating for 30 minutes;

[0028] (3) Mixture is dropped in the blasting machine and water-soluble chitosan steam is introduced into the blasting machine, and then sprayed and expanded;

[0029] (4) Place the puffed mixture in ...

Embodiment 2

[0035] A preparation process of special activated carbon for formaldehyde absorption, comprising the following steps:

[0036] (1) Crush the raw materials into 200-500 mesh granules, put the granular raw materials into a pressure tank for pressure treatment, stop pressurization after the pressure reaches 3.2MPa and keep the pressure for 10 minutes, and then release the pressure tank within 1 minute Pressure to normal pressure; material is coal powder;

[0037] (2) The raw material after the pressure treatment is mixed with 2% tea polyphenols of the raw material quality, and the mixture is heated to 55% in the gas whose oxygen ratio is 32.5%, and the balance is nitrogen, argon, and neon. Stir the mixture constantly, and finish heating after 30 minutes;

[0038] (3) Mixture is dropped in the blasting machine and water-soluble chitosan steam is introduced into the blasting machine, and then sprayed and expanded;

[0039] (4) Place the puffed mixture in an acidic atmosphere for ...

Embodiment 3

[0045] A preparation process of special activated carbon for formaldehyde absorption, comprising the following steps:

[0046] (1) Crush the raw materials into 200-500 mesh granules, put the granular raw materials into a pressure tank for pressure treatment, stop pressurization after the pressure reaches 3.5MPa and keep the pressure for 10 minutes, and then release the pressure tank within 1 minute Pressure to normal pressure; raw material is waste activated carbon;

[0047] (2) Mix the pressurized raw material with 2% tea polyphenols by raw material quality, and heat the mixture to 65°C in the gas whose oxygen ratio is 33.2%, and the balance is nitrogen, argon, and neon. Stir the mixture continuously in the middle, and end it after heating for 30 minutes;

[0048] (3) Mixture is dropped in the blasting machine and water-soluble chitosan steam is introduced into the blasting machine, and then sprayed and expanded;

[0049] (4) Place the puffed mixture in an acidic atmosphere f...

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Abstract

The invention relates to the field of activated carbon, in particular to a preparation process of special activated carbon for formaldehyde absorption, comprising the following steps: pressurization and pressure relief treatment; mixing of raw materials and tea polyphenols; explosion spraying and puffing; acidification; drying; carbonization; activation. In the present invention, the raw materials are further loosened through pressurization and pressure relief treatment, and the surface tension of the raw materials is weakened by the polymerization reaction of tea polyphenols with the raw materials, so that the raw materials are easier to obtain a larger specific surface area in the carbonization process, and the acidified raw materials can be activated during activation. The pore size and distribution are uniform, and the absorption rate of formaldehyde by the activated carbon prepared by the invention is 3-5 times that of ordinary activated carbon.

Description

technical field [0001] The invention relates to the field of activated carbon, in particular to a preparation process of activated carbon special for formaldehyde absorption. Background technique [0002] Activated carbon. It is black powder or massive, granular, honeycomb amorphous carbon, and there are also regular crystalline carbons. In addition to carbon elements, activated carbon also contains two types of admixtures: one is chemically combined elements, mainly oxygen and hydrogen, these elements are left in the carbon due to incomplete carbonization, or in the activation process, foreign Non-carbon elements are chemically combined with the surface of activated carbon. For example, when activated by water vapor, the surface of activated carbon is oxidized or oxidized by water vapor; another type of admixture is ash, which is the inorganic part of activated carbon; ash in activated carbon is easy to cause secondary pollution . [0003] In terms of element composition...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/336C01B32/318B01D53/02
CPCB01D53/02B01D2253/102B01D2257/70B01D2259/4508C01P2006/10C01P2006/12C01P2006/17Y02P20/10Y02P20/129
Inventor 洪闪松
Owner 徐州国锐环保科技有限公司